main, vmm: Add new --numa parameter

Through this new parameter, we give users the opportunity to specify a
set of CPUs attached to a NUMA node that has been previously created
from the --memory-zone parameter.

This parameter will be extended in the future to describe the distance
between multiple nodes.

For instance, if a user wants to attach CPUs 0, 1, 2 and 6 to a NUMA
node, here are two different ways of doing so:
Either
	./cloud-hypervisor ... --numa id=0,cpus=0-2:6
Or
	./cloud-hypervisor ... --numa id=0,cpus=0:1:2:6

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

vmm/src/api/openapi/cloud-hypervisor.yaml

@@ -413,6 +413,10 @@ components:
           type: array
           items:
             $ref: '#/components/schemas/SgxEpcConfig'
+        numa:
+          type: array
+          items:
+            $ref: '#/components/schemas/NumaConfig'
         iommu:
           type: boolean
           default: false
@@ -717,6 +721,20 @@ components:
           type: boolean
           default: false
 
+    NumaConfig:
+      required:
+      - id
+      type: object
+      properties:
+        id:
+          type: integer
+          format: uint32
+        cpus:
+          type: array
+          items:
+            type: integer
+            format: uint8
+
     VmResize:
       type: object
       properties: